Effect of Foliar Spraying with Benzyl Adenine and Nano-Calcium on Some Vegetative Growth and Fruiting Traits of Al-Ubaid Fig Trees

Al-Obaid is a fig cultivar known in Saudi Arabia that has recently entered Iraq. There are not much published articles about it here, so this experiment was conducted to determine the response this cultivar to spraying with benzyl adenine and nano-calcium, in the research station belonging to the Department of Horticulture and Landscape Design, College of Agriculture, Tikrit University, Salah al-Din Governorate during the 2024 season. Three concentrations of growth regulator benzyl adenine (0, 75 and 150 mg L-1) and three concentrations of nano calcium (0, 1.25 and 2.50 g ​​L-1) were sprayed three times through the season. Data of some growth parameters, number of fruits per tree and the yield were collected and statistically analyzed. The results indicated that the effect of spraying with benzyl adenine was significant in most of the studied traits and the concentration of 150 mg L-1 recorded the highest average of leaf area (182.27 cm2), number of fruits (91.00 fruit tree-1) and yield (1940.63 g tree-1), but this treatment caused a significant decrement of shoot length when gave the lowest average (79.74 cm). The foliar spray with nano calcium of 2.5 g L-1 recorded the highest average of leaf area (213.73 cm2) and dry matter of leaves (41.36%) and exceeded the control treatment significantly. The interaction treatments affected significantly on some studied traits but this effect is not stable at one treatment.